The Short Version
The core claim is well-supported: EIA data from April 2026 shows nonrenewable sources—including natural gas, petroleum, coal, and nuclear—supply roughly 73% of U.S. electricity generation and dominate total energy consumption. Renewables account for approximately 26-27% of electricity and a smaller share of overall energy demand. Minor caveats include the classification of nuclear as "nonrenewable" and the fact that renewables are leading new capacity growth, but neither changes the fundamental accuracy of the claim.